21755461

素因数分解:

$7^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1$

素因数の和:99

約数の個数: 40

約数和(自身を含む): 29645784

約数和(自身を除く): 7890323

約数列:

[1, 7, 13, 17, 41, 49, 91, 119, 221, 287, 343, 533, 637, 697, 833, 1547, 2009, 2401, 3731, 4459, 4879, 5831, 9061, 10829, 14063, 26117, 31213, 34153, 40817, 63427, 75803, 98441, 182819, 239071, 443989, 530621, 1279733, 1673497, 3107923, 21755461]

約数ペア:

[(1, 21755461), (7, 3107923), (13, 1673497), (17, 1279733), (41, 530621), (49, 443989), (91, 239071), (119, 182819), (221, 98441), (287, 75803), (343, 63427), (533, 40817), (637, 34153), (697, 31213), (833, 26117), (1547, 14063), (2009, 10829), (2401, 9061), (3731, 5831), (4459, 4879)]